Only by giving the alien permanent, total exemption from military service can the government fulfill its part of the statutory bargain and consequently invoke the bar to citizenship set forth in Section 315(a). See In re Rego's Petition, 289 F.2d 174 (3d Cir. 1961); In re Chrambach, 346 F. Supp. 362, 368 (D.Md. 1972); In re Naturalization of Sheehan, Petition No. 795515 (S.D.N.Y., April 21, 1975); In re Mincheff, 13 I. N.Dec. 715 (1971). Retention of an alien in classification I-A is inconsistent with the type of permanent, total exemption from military service envisioned by Astrup, supra.